رفقای دانشگاهی

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
//hanoi towers by mehrdad//
void Hanoi       (int StartCol, int EndCol, int nDisks);
int  ParseCmdLine(int argc, char *argv[],
    int *StartCol, int *EndCol, int *nDisks);

int main(int argc, char *argv[]) {
    int StartCol, EndCol, nDisks;

    if ( !ParseCmdLine(argc, argv, &StartCol, &EndCol, &nDisks) )
 exit(EXIT_FAILURE);

    printf("Towers of Hanoi!\n");
    printf("================\n\n");

    printf("To move %d disks from column %d to column %d...\n\n",
    nDisks, StartCol, EndCol);
    Hanoi(StartCol, EndCol, nDisks);

    exit(EXIT_SUCCESS);
}

void Hanoi(int StartCol, int EndCol, int nDisks) {
    if ( nDisks ) {
 Hanoi(StartCol, 6 - (StartCol + EndCol), nDisks - 1);
 printf("Move disk from column %d to column %d\n", StartCol, EndCol);
 Hanoi(6 - (StartCol + EndCol), EndCol, nDisks - 1);
    }
}

int ParseCmdLine(int argc, char *argv[],
   int *StartCol, int *EndCol, int *nDisks) {
    int n = 1;

    *nDisks   = 4;
    *StartCol = 1;
    *EndCol   = 2;

    while ( n < argc ) {
 if ( !strncmp(argv[n], "-d", 2) || !strncmp(argv[n], "-D", 2) ) {
     *nDisks = strtol(&argv[n][2], NULL, 0);
     if ( *nDisks < 1 ) {
  printf("Must have at least 1 disk to move!\n");
  return 0;
     }
 }
 else if ( !strncmp(argv[n], "-s", 2) || !strncmp(argv[n], "-S", 2) ) {
     *StartCol = strtol(&argv[n][2], NULL, 0);
     if ( *StartCol < 1 || *StartCol > 3 ) {
  printf("Start column must be 1, 2 or 3!\n");
  return 0;
     }
 }
 else if ( !strncmp(argv[n], "-e", 2) || !strncmp(argv[n], "-E", 2) ) {
     *EndCol = strtol(&argv[n][2], NULL, 0);
     if ( *EndCol < 1 || *EndCol > 3 ) {
  printf("End column must be 1, 2 or 3!\n");
  return 0;
     }
     if ( *EndCol == *StartCol ) {
  printf("Start column and end column must be different!\n");
  return 0;
     }
 }
 ++n;
    }
    return 1;
}